题目内容

mRNA是细胞内RNA比例最高的一种,因为它与基因表达有关。()

A. 对
B. 错

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DNA的Tm值随(A+T)/(G+C)比值的增加而增加。()

A. 对
B. 错

mRNA上密码子为pCAG,则与之对应的tRNA上反密码子为pATG。()

A. 对
B. 错

He put the big box down on the floor, _______ (breathe) heavily and _________ (look) exhausted.

________ (consider) the importance of the experiment, they checked the result again and again.

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